During a visual field test, patients are instructed to look straight ahead at a fixed point as objects are flashed in their peripheral field of vision. A patient with normal vision should have:A.no difficulty detecting a moving point of light in the periphery in dim light conditions.B.no difficulty correctly identifying color presented in the periphery in dim light conditions.C.difficulty detecting motion in the periphery in bright light conditions.D.difficulty correctly identifying color presented near the point of fixation in bright light conditions.
Question
During a visual field test, patients are instructed to look straight ahead at a fixed point as objects are flashed in their peripheral field of vision. A patient with normal vision should have:A.no difficulty detecting a moving point of light in the periphery in dim light conditions.B.no difficulty correctly identifying color presented in the periphery in dim light conditions.C.difficulty detecting motion in the periphery in bright light conditions.D.difficulty correctly identifying color presented near the point of fixation in bright light conditions.
Solution
A patient with normal vision should have:
A. No difficulty detecting a moving point of light in the periphery in dim light conditions.
This is because the peripheral vision, which is primarily mediated by rod cells, is very sensitive to motion and can function well in low light conditions.
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